Sanders says in an interview with The Associated Press that it's unlikely the results will affect the awarding of delegates in the state and he would "prefer to save the taxpayers of Missouri some money."

Clinton has a narrow lead of 1,531 votes, but under state law Sanders could have sought a recount because the margin was less than one-half of one percent.

Clinton will get an extra two delegates from Missouri for winning the statewide vote.

Clinton won all five of Tuesday's primary contests, including Florida, Ohio, Illinois and North Carolina.

The Republican race in Missouri remains too close to call between Donald Trump and Ted Cruz.